From 2ac23d2134611b4e5b0fb389911bd03baa685df3 Mon Sep 17 00:00:00 2001 From: Amit Shah Date: Mon, 21 Mar 2011 20:32:58 +0100 Subject: [PATCH] iohandlers: Add enable/disable_write_fd_handler() functions These will be used to provide a cleaner API for the nonblocking case. Signed-off-by: Amit Shah Signed-off-by: Cole Robinson --- iohandler.c | 35 +++++++++++++++++++++++++++++++++++ main-loop.h | 3 +++ 2 files changed, 38 insertions(+) diff --git a/iohandler.c b/iohandler.c index a2d871b..c00fecd 100644 --- a/iohandler.c +++ b/iohandler.c @@ -45,6 +45,41 @@ typedef struct IOHandlerRecord { static QLIST_HEAD(, IOHandlerRecord) io_handlers = QLIST_HEAD_INITIALIZER(io_handlers); +static IOHandlerRecord *find_iohandler(int fd) +{ + IOHandlerRecord *ioh; + + QLIST_FOREACH(ioh, &io_handlers, next) { + if (ioh->fd == fd) { + return ioh; + } + } + return NULL; +} + +void enable_write_fd_handler(int fd, IOHandler *fd_write) +{ + IOHandlerRecord *ioh; + + ioh = find_iohandler(fd); + if (!ioh) { + return; + } + + ioh->fd_write = fd_write; +} + +void disable_write_fd_handler(int fd) +{ + IOHandlerRecord *ioh; + + ioh = find_iohandler(fd); + if (!ioh) { + return; + } + + ioh->fd_write = NULL; +} /* XXX: fd_read_poll should be suppressed, but an API change is necessary in the character devices to suppress fd_can_read(). */ diff --git a/main-loop.h b/main-loop.h index dce1cd9..eb31273 100644 --- a/main-loop.h +++ b/main-loop.h @@ -175,6 +175,9 @@ typedef void IOReadHandler(void *opaque, const uint8_t *buf, int size); typedef int IOCanReadHandler(void *opaque); typedef void IOHandler(void *opaque); +void enable_write_fd_handler(int fd, IOHandler *fd_write); +void disable_write_fd_handler(int fd); + /** * qemu_set_fd_handler2: Register a file descriptor with the main loop * -- 1.7.12.1